fix data generation error for "event" configuration

value error on line 344 bc ambiguous truth value
c0_width = ((s_picks - p_picks) * self.sampling_rate / 200.0).max() if p_picks!=s_picks else 50

quakeflow_nc.py

@@ -341,7 +341,7 @@ class QuakeFlow_NC(datasets.GeneratorBasedBuilder):
                                 # center = (attrs["phase_index"][::2] + attrs["phase_index"][1::2])/2.0
                                 ## assuming only one event with both P and S picks
                                 c0 = ((p_picks) + (s_picks)) / 2.0 # phase center
-                                c0_width = ((s_picks - p_picks) * self.sampling_rate / 200.0).max() if p_picks!=s_picks else 50
+                                c0_width = ((s_picks - p_picks) * self.sampling_rate / 200.0).max() if len(np.intersect1d(p_picks, s_picks)) == 0 else 50
                                 dx = round(
                                     (event_attrs["longitude"] - attrs["longitude"])
                                     * np.cos(np.radians(event_attrs["latitude"]))